Editing Law Of Definite Proportion HW Handout
ChemistryWiki
|
RecentChanges
|
Preferences
In 1799, French chemist Joseph Proust proposed Law of Definite Proportion. It states that the proportion by mass of the elements in a given compound is always the same (i.e. fixed mass ratio). In "Dimensional Analysis" land, the law of definite proportion is a conversion factor between the mass of elements (or with the total mass) of a compound. Therefore, once you have this fixed mass ratio, you can use dimensional analysis to calculate unknown mass information.<br> <center><b>Show all work using the dimensional analysis process and appropriate math/sig fig.</b></center><br> 1. A sample of the compound methane (CH<sub>4</sub>) consists of 75g carbon and 25g of hydrogen. How many grams of carbon are in a sample if there are 24.5g of hydrogen?<br> <br> <br> <br> <br> <br> <br> <br> <br> <br> 2. In a 456g sample of a compound, there are 129g of boron. What is the mass of the compound if there are 546g of boron?<br> <br> <br> <br> <br> <br> <br> <br> <br> <br> 3. A 125g sample of a compound (that consists of Na & S) has 24.41g of Na. If you have 45.2g of the compound, how many grams of S do you have?<br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> Answers:<br>
View other revisions
ChemistryWiki
|
RecentChanges
|
Preferences